Here's an AddIn to divide shapes, bitmaps, lines, etc. into any number of parts (from 2 to 12):
You can select horizontal or vertical divisions. As a bonus, you can divide into parts based on the Golden Mean. This "perfect proportion" has been known and used since ancient Greek times. Now your CorelDraw artwork can have the same timeless beauty as the Parthenon!
To install, extract the *.DLL file into your CorelDraw AddIns folder. On Win7, this folder is at My Documents\Corel\VSTA\CorelDRAW\Addinsthen restart CorelDraw (if it was running).
Enjoy!